Electromagnetic Radiation Waves in the Universe
Wave length
•
Waves are three
dimensional
•
Waves vibrate in all
planes around a center
line.
•
The waves have high
points called “
crests.”
•
Waves also have low
points called “
troughs
.”
•
The distance from one
crest to the next crest is
called a “
wavelength
.”
•
*The number of waves
passing a given point in
one second is called the
“frequency
.”
Elec
trom
agne
tic
radi
atio
n
wa
ves
Radio-TV -Microwave- Infrared - VISIBLE -Ultraviolet -X-rays - Gamma- Cosmic
Remember radio waves are long…and gamma rays are small
•
Emitted by
–
Astronomical Objects
–
Radio Station
Transmitters
•
Detected by
–
Ground based radio
telescopes
–
*If you turn on a radio, it
will convert the radio
wave energy into sound
energy.
Radio
(Longest
electromagnetic waves)
•
Emitted by:
–
Gas clouds collapsing
into stars
–
Microwave Ovens
–
Radar Stations
–
Cell Phones
•
Detected by
–
Microwave Telescopes
–
Food (heated)
–
Cell phones
–
Radar (systems)
Microwave
•
Emitted by
–
Sun and stars (Near)
–
TV Remote Controls
–
Food Warming Lights
(Thermal)
–
*Everything at room
temperature or
above,=HEAT
•
Detected by
–
Infrared Cameras
–
TVs, VCRs,
–
Your skin
Infrared
(Heat or Thermal)
Are you a source of infrared? YES you are!
•
Emitted by
–
The sun and other
astronomical objects
–
Laser pointers
–
Light bulbs
•
Detected by
–
Cameras
(film or digital)
–
Human eyes
–
Plants (red light)
–
Telescopes
Visible
Eac
h
co
lor
is
a differe
nt
si
ze
w
ave
.
Red the longest
&
violet the shortest
•
Emitted by
–
Tanning booths (A)
–
The sun (A)
–
Black light bulbs (B)
–
UV lamps
•
Detected by
–
Space based UV
detectors
–
UV Cameras
–
Flying insects (flies)
Ultraviolet
Sunburn / black light
•
Emitted by
–
Astronomical objects
–
X-ray machines
–
CAT scan machines
–
Older televisions
–
Radioactive minerals
–
Airport luggage
scanners
•
Detected by
–
Space based X-ray
detectors
–
X-ray film
–
CCD detectors
X-ray
•
Emitted by
–
Radioactive materials
–
Exploding nuclear
weapons
–
Gamma-ray bursts
–
Solar flares
•
Detected by
•
--
Geiger counters
–
Gamma detectors and
astronomical satellites
–
Medical imaging detectors
Gamma Ray
(Short electromagnetic waves but more energetic)
•
A great question!
•
Radio waves= (Buildings to
human size);
•
Microwaves
(Humans-beetles);
•
Infrared waves
(Eye of a needle);
Visible waves
(microscopic size)!
WOW! All the rest are the size
of molecules, atoms, atomic
nuclei and smaller..
Electromagnetic radiation waves, including radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays, play diverse roles in astronomy and technology. Understanding their properties, wavelengths, frequencies, and detection methods sheds light on their applications and significance in various aspects of our daily lives and the universe.
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Presentation Transcript
Electromagnetic radiation waves Waves are three dimensional Waves vibrate in all planes around a center line. The waves have high points called crests. Waves also have low points called troughs. The distance from one crest to the next crest is called a wavelength. *The number of waves passing a given point in one second is called the frequency. Wave length
Remember radio waves are longand gamma rays are small Radio-TV -Microwave- Infrared - VISIBLE -Ultraviolet -X-rays - Gamma- Cosmic
Radio (Longest electromagnetic waves) Emitted by Astronomical Objects Radio Station Transmitters Detected by Ground based radio telescopes *If you turn on a radio, it will convert the radio wave energy into sound energy. dish for radio waves gbt_5
Microwave photo of microwave oven usappliance_1733_8257699 Emitted by: Gas clouds collapsing into stars Microwave Ovens Radar Stations Cell Phones photo of spacecraft MAP Spacecraft Portrait, Computer rendering Detected by Microwave Telescopes Food (heated) Cell phones Radar (systems)
Infrared (Heat or Thermal) Are you a source of infrared? YES you are! photo of remote control Click here for a larger image. Emitted by Sun and stars (Near) TV Remote Controls Food Warming Lights (Thermal) *Everything at room temperature or above,=HEAT Detected by Infrared Cameras TVs, VCRs, Your skin
Visible Each color is a different size wave. Red the longest & violet the shortest Emitted by The sun and other astronomical objects Laser pointers Light bulbs RoyG.Biv Detected by Cameras (film or digital) Human eyes Plants (red light) Telescopes
Ultraviolet Sunburn / black light He can get skin cancer! Emitted by Tanning booths (A) The sun (A) Black light bulbs (B) UV lamps Detected by Space based UV detectors UV Cameras Flying insects (flies)
X-ray Emitted by Astronomical objects X-ray machines CAT scan machines Older televisions Radioactive minerals Airport luggage scanners Detected by Space based X-ray detectors X-ray film CCD detectors
Gamma Ray (Short electromagnetic waves but more energetic) incredible hulk The Incredible Hulk - Incredible Hulk, The - Pic 1 ( Glossy Photos ) Emitted by Radioactive materials Exploding nuclear weapons Gamma-ray bursts Solar flares Detected by --Geiger counters Gamma detectors and astronomical satellites Medical imaging detectors
How big are the waves? A great question! Radio waves= (Buildings to human size); Microwaves (Humans-beetles); Infrared waves (Eye of a needle); Visible waves (microscopic size)! WOW! All the rest are the size of molecules, atoms, atomic nuclei and smaller..
